From 5fe7ef6b22ae1265a52dee422e1c3b6777519ca3 Mon Sep 17 00:00:00 2001
From: Guillaume Ayoub <guillaume@courtbouillon.org>
Date: Tue, 13 Jul 2021 20:16:20 +0200
Subject: [PATCH] Ignore missing glyphs when subsetting fonts

Instead of raising an error, just ignore missing fonts. Also include the notdef
glyph to (hopefully) avoid invalid documents.

Related to #1386.
---
 weasyprint/document.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/weasyprint/document.py b/weasyprint/document.py
index 87d5755bee..5caf991add 100644
--- a/weasyprint/document.py
+++ b/weasyprint/document.py
@@ -1227,13 +1227,14 @@ def write_pdf(self, target=None, zoom=1, attachments=None, finisher=None):
                 try:
                     ttfont = TTFont(full_font)
                     options = subset.Options(
-                        retain_gids=True, passthrough_tables=True)
+                        retain_gids=True, passthrough_tables=True,
+                        ignore_missing_glyphs=True, notdef_glyph=True)
                     subsetter = subset.Subsetter(options)
                     subsetter.populate(gids=cmap)
                     subsetter.subset(ttfont)
                     ttfont.save(optimized_font)
                     content = optimized_font.getvalue()
-                except (TTLibError, subset.Subsetter.SubsettingError):
+                except TTLibError:
                     LOGGER.warning('Unable to optimize font')
                     content = fonts[0].file_content
             else: